JP2008104325A - Stator core and rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator core in which the end face of each stator tee is arranged at a predetermined position, and to provide a stator core and a rotary electric machine in which variation of clearance between slit stator cores is suppressed and magnetic reluctance is made uniform in the circumferential direction. <P>SOLUTION: The stator core 10 has an assembly stator core 12 formed by arranging slit stator cores 13 annularly, a fixing member 11 arranged on the outer circumferential surface of the assembly stator core 12 and fixing the slit stator cores 13 under a state arranged annularly by pressing the slit stator cores 13 radially inward of the assembly stator core 12, and a fragile portion 15 formed between the slit stator cores 13 and the fixing member 11 and deformed by a pressing force from the fixing member 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a stator core and a rotating electrical machine, and more particularly to a stator core and a rotating electrical machine formed by tightening a plurality of divided stator cores in an annular shape.

  In recent years, permanent magnet type synchronous motors are used in hybrid automobiles and the like. Conventionally, various types of stator cores have been proposed that facilitate the assembly of the stator.

  For example, a stator core described in Japanese Patent Application Laid-Open No. 5-95645 includes an inner stator core having a plurality of winding bodies around which coils are wound on an outer peripheral surface, and an annular outer stator core having an inner stator core mounted on the inner peripheral surface. It has.

  A stator described in Japanese Patent Application Laid-Open No. 2004-328965 includes a cylindrical fixing member and a stator core formed in an annular shape by press-fitting a core in which teeth are formed into the fixing member.

The core has a large circumference on one end side and a small circumference on the other end side. And a stator core is comprised by combining each core so that an edge part with a long circumference and an edge part with a short circumference may alternate.
JP-A-5-95645 JP 2004-328965 A

  The configuration of the stator core is not limited to the case where the split stator core is configured to be press-fitted into a cylindrical housing, as in JP-A-2004-328965, etc., and a plurality of split stator cores arranged in an annular shape are shrink-fitted. There is a method of fixing with an annular fixing member.

  In any of the press-fitting method and the shrink-fitting method, it is generally performed that each member is provided with an intersection from the viewpoint of manufacturing.

  For this reason, when each divided stator core is fixed in an annular shape to form a stator core, any one of the divided stator cores protrudes inward in the radial direction of the stator core, or any one of the divided stator cores is fixed in a slightly rotated state. There are cases.

  For this reason, the end surfaces in the radial direction of the stator teeth of the respective divided stator cores may not line up on the same circumference, and one of the stator teeth may protrude inward in the radial direction. When the rotor is arranged in the stator core configured as described above and the rotor is driven, the suction force generated between the rotor and the stator core varies depending on the position, and the rotor may vibrate or the rotor and the stator teeth may come into contact with each other. There is.

  When one of the divided stator cores is fixed in a rotated state, a gap is generated between this divided stator core and the adjacent divided stator core, and the magnetic resistance between the other divided stator cores becomes higher. For this reason, dispersion | distribution arises in the distribution of the magnetic resistance of the circumferential direction in a stator core, and the flow of magnetic flux arises within the formed stator core.

  The present invention has been made in view of the above-described problems, and a first object thereof is to provide a stator core and a rotating electrical machine in which end faces of the respective stator teeth are arranged at predetermined positions. A second object of the present invention is to provide a stator core and a rotating electrical machine in which variations in gaps between the respective divided stator cores are suppressed and the circumferential magnetic resistance is made uniform.

  In one aspect, the stator core according to the present invention is an assembly stator core formed by annularly arranging a plurality of split stator cores, and is disposed on the outer peripheral surface of the assembly stator core, and each split stator core is disposed radially inward of the assembly stator core. And a fixing member that can be fixed in a state where the divided stator cores are annularly arranged. And the weak part which can be deform | transformed with the pressing force from a fixing member is provided between the division | segmentation stator core and the fixing member.

  In addition, a weak part is a part which not only deform | transforms, such as elastic deformation and plastic deformation, but also brittle fractures.

  Preferably, the weakened portion is deformable in the radial direction of the assembled stator core. Preferably, the weakened portion is integrally formed on at least one of the outer peripheral surface of the split stator core and the inner peripheral surface of the fixing member. Preferably, the fragile portion includes a void portion formed in the fragile portion.

  In another aspect, a stator core according to the present invention is arranged on an outer circumferential surface of an assembled stator core formed by annularly arranging a plurality of divided stator cores, and each divided stator core is disposed radially inward of the assembled stator core. And a fixing member that can be fixed in a state where the divided stator cores are annularly arranged. A deformable fragile portion is provided between the divided stator cores. Preferably, the weakened portion is formed at a circumferential end portion of the divided stator core. Preferably, the weakened portion is deformable in the circumferential direction of the assembled stator core. Preferably, the fragile portion includes a void portion formed in the fragile portion.

  In another aspect, a stator core according to the present invention is arranged on an outer circumferential surface of an assembled stator core formed by annularly arranging a plurality of divided stator cores, and each divided stator core is disposed radially inward of the assembled stator core. And a fixing member that can be fixed in a state where the divided stator cores are annularly arranged. Then, one hardness of the fixed member and the divided stator core is made lower than the other hardness, and one of the divided stator core and the fixed member can be deformed by a pressing force from the fixed member.

  In one aspect, the rotating electrical machine according to the present invention is an assembly stator core formed by annularly arranging a plurality of divided stator cores, and arranged on the outer peripheral surface of the assembly stator core, and each divided stator core is radially inward of the assembly stator core. And a fixing member that can be fixed in a state where the divided stator cores are arranged in an annular shape, and a fragile portion that is formed between the divided stator core and the fixing member and can be deformed by a pressing force from the fixing member. . Furthermore, the rotating shaft provided in the inner peripheral side of the assembly stator core and the rotor fixed to the rotating shaft are provided.

  In another aspect, the rotating electrical machine according to the present invention is an assembly stator core formed by annularly arranging a plurality of divided stator cores, and disposed on the outer peripheral surface of the assembly stator core, and each divided stator core is radially inward of the assembly stator core. And a fixing member that can be fixed in a state where the divided stator cores are annularly arranged. Furthermore, a deformable weak part formed between the divided stator cores, a rotatable rotating shaft provided on the inner peripheral side of the assembled stator core, and a rotor fixed to the rotating shaft are provided.

  In another aspect, the rotating electrical machine according to the present invention includes a rotatable rotating shaft, a rotor fixed to the rotating shaft, an assembled stator core formed by annularly arranging a plurality of divided stator cores, and an assembled stator core. And a fixing member that is arranged on the outer peripheral surface and can be fixed in a state where the divided stator cores are arranged in an annular shape by pressing each divided stator core inward in the radial direction of the assembled stator core. Then, one hardness of the fixed member and the divided stator core is made lower than the other hardness, and one of the divided stator core and the fixed member can be deformed by a pressing force from the fixed member.

  According to the stator core and the rotating electric machine according to the present invention, in the split stator core that receives a large pressing force from the fixing member, the pressing force received from the fixing member can be reduced by deforming the fragile portion. Thereby, it can suppress that a specific division | segmentation stator core protrudes to radial inside rather than another division | segmentation stator core.

  According to the stator core and the rotating electrical machine according to the present invention, the split stator core displaced from the predetermined position can be displaced to the predetermined position by deforming the fragile portion by the pressing force received from the fixing member or the adjacent split stator core. it can. Thereby, each division | segmentation stator core can be arranged in a predetermined position, the magnetic resistance between division | segmentation stator cores can be made uniform, and it can suppress that the bias arises in the flow of magnetic flux.

  According to the stator core and the rotating electrical machine according to the present invention, the split stator core displaced from the predetermined position is deformed by the pressing force received from the fixed member or the adjacent split stator core, or the fixed member is deformed. Thus, it can be displaced to a predetermined position.

  Embodiments according to the present invention will be described with reference to FIGS. In the following embodiment, the present invention can be applied to a motor generator (rotary electric machine) mounted on a hybrid vehicle, but various vehicles other than the hybrid vehicle (for example, an electric vehicle including a fuel cell vehicle and an electric vehicle). In addition, the present invention can be applied to rotating electrical machines mounted on various devices such as industrial equipment, air conditioning equipment, and environmental equipment.

  In the following embodiments, the same or corresponding parts are denoted by the same reference numerals. Furthermore, it is also planned from the beginning that not all of the constituent elements of each embodiment are essential, and some constituent elements may be omitted.

(Embodiment 1)
The first embodiment will be described with reference to FIGS. FIG. 1 is a cross-sectional view of rotating electric machine 100 according to the first embodiment. A rotating electrical machine 100 shown in FIG. 1 includes an annular stator core 10, a coil (not shown) wound around a stator tooth 14 of the stator core 10, and a rotating shaft that is rotatably provided on the inner periphery of the stator core 10. 113 and a rotor 112 fixed to the rotating shaft 113.

  The rotor 112 is made of a magnetic material such as iron or an iron alloy, and includes a rotor core 110 formed by laminating a plurality of electromagnetic steel plates, and a plurality of permanent magnets 111 provided on the surface of the rotor core 110. .

  In the example shown in FIG. 1, although it is set as SPM (Surface Permanent Magnet), it is good also as IPM (Interior Permanent Magnet). In the example shown in FIG. 1, the coil wound around the stator core 10 is omitted.

  The stator core 10 is configured in a cylindrical shape. Then, the rotor 112 is rotated by the magnetic flux generated between the rotor 112 and the rotor 112. Note that when the rotating electrical machine including the stator core 10 is applied to a hybrid vehicle, current is supplied from the battery via an inverter or the like, and the rotor 112 rotates.

  The stator core 10 includes an annular fixing member 11 and an assembled stator core 12 disposed on the inner peripheral surface of the fixing member 11.

  The assembled stator core 12 is formed by arranging a plurality of divided stator cores 13 on the inner peripheral surface of the fixed member 11 in an annular shape.

  The fixing member 11 is disposed on the outer peripheral surface of the assembled stator core 12 and can press the divided stator cores 13 inward in the radial direction of the assembled stator core 12 to fix the divided stator cores 13 in an annular arrangement. .

  FIG. 2 is an enlarged plan view of the divided stator core 13. As shown in FIG. 2, the divided stator core 13 is formed on a main body 53 formed in an arc shape and an inner peripheral surface of the main body 53, and protrudes inward in the radial direction of the assembled stator core 12. And stator teeth 14. The end surface 14a of the stator tooth 14 positioned radially inward of the assembled stator core 12 is curved in an arc shape. An armature winding (not shown) is wound around the stator teeth 14 to form a coil.

  The main body 53 has a fan shape, and an end face 53b positioned in the circumferential direction extends along the radial direction of the assembled stator core 12 shown in FIG. That is, the main body 53 is formed in a tapered shape so that the length in the circumferential direction becomes shorter as it goes inward in the radial direction.

  A weakened portion 15 is formed on the outer peripheral surface 53 a of the main body portion 53. The fragile portion 15 includes a frame 15b that protrudes from the outer surface of the main body 53 and is formed in an annular shape, and a gap 15a that is defined by the frame 15b.

  That is, the fragile portion 15 is less rigid than the divided stator core 13 and can be deformed by plastic deformation or brittle fracture when a predetermined pressing force is applied from the outside. In particular, the fragile portion 15 can be easily deformed in the radial direction of the assembled stator core 12 and the fixing member 11 shown in FIG.

  A method for manufacturing the stator core 10 configured as described above will be described with reference to FIGS. FIG. 3 is a cross-sectional view showing a first manufacturing process of the stator core 10. As shown in FIG. 3, the assembled stator core 12 is formed by arranging a plurality of divided stator cores 13 in an annular shape. As described above, when the divided stator cores 13 are arranged, the end surfaces 14a of the stator teeth 14 of the divided stator cores 13 are also arranged in an annular shape. Note that the curvatures of the end faces 14a of the stator teeth 14 are all the same, and the end faces 14a are arranged on the same circumference.

  An armature winding is wound around the stator teeth 14 of the divided stator core 13 in advance. Rather than winding the armature winding around each stator tooth 14 in the state of the assembled stator core 12, it is easier to wind the armature winding around the stator teeth 14 of the divided stator core 13 in an independent state. The wire can be wound.

  FIG. 4 is a cross-sectional view illustrating a second manufacturing process of the stator core 10. As shown in FIG. 4, the inner mold 20 is inserted into the assembled stator core 12. The inner mold 20 is a cylinder, and the outer peripheral surface 20 a of the inner mold 20 is in contact with the end surface 14 a of each stator tooth 14.

  In addition, you may comprise so that the inner metal mold | die 20 can be diameter-expanded slightly in a radial direction. Thereby, when inserting the inner metal mold | die 20 in the assembly stator core 12, it inserts as a diameter-reduced state and can suppress the contact with the inner metal mold | die 20 and each division | segmentation stator core 13 in the case of insertion. .

  Then, when the insertion of the inner mold 20 is completed, the inner mold 20 is slightly expanded in diameter. Thereby, the end surface 14a of each stator tooth 14 and the outer peripheral surface 20a of the inner mold 20 can be brought into contact with each other, and the end surface 14a can be aligned along the outer peripheral surface 20a of the inner mold 20.

  FIG. 5 is a cross-sectional view illustrating a third manufacturing process of the stator core 10. As shown in FIG. 5, the fixing member 11 is attached to the outer peripheral surface of the assembled stator core 12 by shrink fitting. As a result, each divided stator core 13 is pressed from the fixed member 11 radially inward.

  Since each divided stator core 13 is configured to taper toward the inner side in the radial direction, each of the divided stator cores 13 is restrained by the adjacent divided stator core 13 with the displacement toward the inner side in the radial direction. For this reason, the pressing force between the adjacent divided stator cores 13 is increased, the frictional force between the divided stator cores 13 is increased, and the assembled stator core 12 is fixed to the inner peripheral surface of the fixing member 11.

  Furthermore, since the fixing member 11 is mounted in a state where the inner mold 20 is inserted into the assembled stator core 12, the end surface 14a of the stator teeth 14 is pressed against the outer peripheral surface 20a of the inner mold 20, and the end surface 14a is the outer peripheral surface 20a. Arrange along exactly.

  FIG. 6 is an enlarged cross-sectional view of a part of the split stator core 13 in FIG. When the divided stator core 13 is manufactured, it is generally manufactured with a certain degree of intersection. In addition, a slight error may occur when manufacturing each divided stator core 13.

  For this reason, in any split stator core 13, the outer peripheral surface 53 a protrudes radially outward from the outer peripheral surface 53 a of the adjacent split stator core 13 with the end surface 14 a in contact with the outer peripheral surface 20 a of the inner mold 20. It may be in a state.

  When the specific split stator core 13 protrudes radially outward from the other split stator core 13 in this way, the fixing member 11 is curved radially outward at that portion. The pressing force with which the divided stator core 13 is pressed radially inward from the fixed member 11 is larger than the pressing force received by the other divided stator core 13.

  FIG. 7 is a cross-sectional view showing a second state after the first state of the split stator core 13 shown in FIG. As shown in FIG. 7, the fragile portion 15 formed in the divided stator core 13 projecting radially outward from the other divided stator core 13 is deformed.

  In the example illustrated in FIG. 7, the frame body 15 b is plastically deformed so that the gap portion 15 a of the fragile portion 15 is crushed. As described above, the fragile portion 15 is plastically deformed inward in the radial direction, so that the bulge of the fixing member 11 in the portion is reduced, and the pressing force for pressing the divided stator core 13 is reduced.

  In addition, like the example shown in FIG. 7, it is not restricted to the case where the frame 15b of the weak part 15 deforms plastically, and the weak part 15 may be brittle fractured. That is, any means can be used as long as the swelling of the fixing member 11 can be reduced and the internal stress that presses the divided stator core 13 in the radial direction between the divided stator core 13 and the fixing member 11 can be reduced. .

  In this way, it is possible to suppress an excessive pressing force from being applied to the specific divided stator core 13 from the fixing member 11 so that the pressing force applied to each divided stator core 13 falls within a predetermined range.

  Then, as shown in FIG. 1, the inner mold 20 shown in FIG. 5 is pulled out from the assembled stator core 12. At this time, since the pressing force applied from the fixing member 11 to each divided stator core 13 is within a predetermined range, any divided stator core 13 can be prevented from projecting radially inward. .

  And the state where the end surface 14a of each division | segmentation stator core 13 was arranged on the same periphery can be maintained.

  By disposing the rotor 112 in the stator core 10 thus configured, the gap between each stator tooth 14 and the rotor 112 can be made uniform. Thereby, an electric current is supplied to an armature winding (not shown), the amount of magnetic flux generated between each stator tooth 14 and the rotor 112 can be made uniform, and the occurrence of vibration in the rotor 112 is suppressed. Can do.

  FIG. 8 is a cross-sectional view showing a rotating electrical machine according to a first modification of the first embodiment. As shown in FIG. 8, the fragile portion 55 may be provided on the inner peripheral surface of the fixing member 11. FIG. 9 is a cross-sectional view when the fixing member 11 is shrink-fitted in the manufacturing process of the stator core 10 shown in FIG. 8, and FIG. 10 is a cross-sectional view showing a state where the fragile portion of the fixing member 11 is deformed.

  As shown in FIG. 9, the outer peripheral surface 53 a of the specific split stator core 13 is located radially outward from the other split stator cores 13. And as shown in FIG. 10, the weak part 55 formed in the internal peripheral surface of the fixing member 11 in which this division | segmentation stator core 13 is located deform | transforms to radial direction.

  Thereby, the pressing force with which the fixing member 11 presses the split stator core 13 is reduced, and when the inner mold 20 is pulled out, the split stator core 13 can be prevented from being displaced radially inward.

  The fragile portions 15 and 55 are formed so as to protrude outward from the outer peripheral surface 53a of the split stator core 13 and the inner surface of the fixing member 11, but the inside of the split stator core 13 and the fixing member 11 are also formed. It may be formed inside.

  Furthermore, you may make it arrange | position the annular member in which the weak parts 15 and 55 were formed between the fixing member 11 and the division | segmentation stator core 13. FIG.

  FIG. 11 is a cross-sectional view showing a second modification of the first embodiment. As shown in FIG. 11, a protrusion 65 that protrudes radially outward may be formed on the outer peripheral surface 53 a of the divided stator core 13.

  Then, the hardness of the split stator core 13 and the protruding portion 65 is made higher than the hardness of the fixed member 11. As a result, the inner peripheral surface of the fixing member 11 is a weakened portion and can be deformed by the protruding portion 65.

  12 is a cross-sectional view showing a second state after the first state of the split stator core and the fixing member shown in FIG. As shown in FIG. 12, the protruding portion 65 formed on the specific divided stator core 13 in which the outer peripheral surface 53 a is positioned radially outward from the other divided stator core 13 enters the fixed member 11.

  As described above, the portion of the fixed member 11 that presses the split stator core 13 protruding outward in the radial direction is deformed so as to receive the protruding portion 65. And the part which presses the division | segmentation stator core 13 which protrudes to radial direction outward among the fixing members 11 displaces to radial inner direction, and the swelling of the fixing member 11 of the said part is reduced.

  Thereby, the pressing force by which the fixing member 11 presses the specific divided stator core 13 in which the outer peripheral surface 53a is positioned radially outward from the other divided stator core 13 can be reduced. Therefore, also in the examples shown in FIGS. 11 and 12, similarly to the other examples described above, when the inner mold 20 is pulled out, the specific divided stator core 13 is prevented from being displaced radially inward. Can do.

  11 and 12, the example in which the protruding portion 65 is formed on the outer peripheral surface 53a of each divided stator core 13 is shown, but the present invention is not limited to this. 13 and 14 are cross-sectional views showing a third modification of the first embodiment.

  As shown in FIGS. 13 and 14, the hardness of the fixing member 11 is made higher than the hardness of the divided stator core 13, and a protruding portion 65 protruding radially inward is formed on the inner surface of the fixing member 11. Also good.

  As a result, when the specific divided stator core 13 is positioned radially outward from the other divided stator cores 13, the protrusion 65 formed in the portion of the fixing member 11 that presses the specific divided stator core 13 is this. It enters into a specific split stator core 13.

  As described above, the protrusion 65 deforms a part of the specific split stator core 13 and enters the split stator core 13, so that the swelling of the fixing member 11 is alleviated and the pressing force of the fixing member 11 is reduced. The

(Embodiment 2)
A rotating electrical machine and a stator core according to the second embodiment will be described with reference to FIGS. 15 to 20. Note that the same components as those shown in FIGS. 1 to 14 are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 15 is a cross-sectional view of the rotating electrical machine according to the second embodiment, and FIG. 16 is a cross-sectional view of the divided stator core 23. As shown in FIG. 16, a plurality of weakened portions 25 are arranged in the radial direction on one end surface in the circumferential direction of the divided stator core 23. The fragile portion 25 also has a gap portion 25a formed therein.

  A recess 26 that receives the fragile portion 25 of the adjacent split stator core 23 is formed on the other end surface of the split stator core 23 in the circumferential direction.

  In FIG. 15, the stator core 10 includes an annular fixing member 11 and an assembled stator core 22 formed by annularly arranging the divided stator cores 23 configured as described above on the inner peripheral surface of the fixing member 11.

  A method for manufacturing the stator core 10 according to the second embodiment will be described with reference to FIGS. FIG. 17 is a cross-sectional view showing a first manufacturing process of stator core 10 according to the second embodiment, and FIG. 18 is a cross-sectional view showing a second manufacturing process. As shown in FIG. 17, the fragile portion 25 of each divided stator core 23 and the concave portion 26 are combined to combine a plurality of divided stator cores 23 in an annular shape.

  Then, in FIG. 18, a cylindrical inner mold 20 is inserted into an assembly stator core 22 formed in an annular shape. Then, the fixing member 11 is shrink fitted on the outer peripheral surface of the assembled stator core 22.

  FIG. 19 is an enlarged cross-sectional view of a part of FIG. 20 is a cross-sectional view showing a second state after the first state of the misaligned divided stator core 23 shown in FIG. As shown in FIG. 19, when the fixing member 11 is shrink-fitted, the specific divided stator core 23 may be fixed in a rotated state. The split stator core 23 is fixed in such a state, for example, when the inner mold 20 is inserted or when the fixing member 11 is shrink-fitted, the split stator core 23 and the inner mold 20 come into contact with each other. This is because, for example, the displacement of the fixing member 11 is caused.

  For example, as shown in FIG. 19, in the divided stator core 23 rotated counterclockwise from a predetermined position, the right portion of the outer peripheral surface 53 a is located radially outward from the other divided stator cores 23.

  Further, the radially outward end face of the divided stator core 23 shifted in position is spaced from the end face of the adjacent split stator core 23 and is in contact only on the radially inner side. . Further, on the end surface 14 a of the stator teeth 14, a portion on the right side in the circumferential direction is lifted from the outer peripheral surface 20 a of the inner mold 20.

  When the fixing member 11 is shrink-fitted on the outer peripheral side of the split stator core 23 that has been displaced in this way, a portion on the right side in the circumferential direction of the outer peripheral surface 53a of the split stator core 23 is strongly pressed. Further, only a portion radially inward of the end surface located on the right side in the circumferential direction is pressed from the adjacent divided stator core 23.

  For this reason, the divided stator core 23 that is rotated counterclockwise and deviated from a predetermined position receives a pressing force that rotates clockwise from the periphery.

  For this reason, as shown in FIG. 20, the misaligned divided stator core 23 fits in a predetermined position by deforming the weakened portion 25 formed on the circumferential end surface thereof and the weakened portion 25 of the adjacent divided stator core 23. be able to.

  Then, both end faces located in the circumferential direction can make good contact with the end faces of the adjacent divided stator cores 23. Thereby, the distribution of the magnetic resistance in the circumferential direction of the stator core 10 to be formed becomes substantially uniform.

  In particular, since it is possible to suppress the formation of a part having a high magnetic resistance, iron loss can be reduced, and an efficient rotating electrical machine can be provided.

  Furthermore, the end surface 14a of the stator teeth 14 can be along the outer peripheral surface 20a of the inner mold 20, and adverse effects such as generation of vibration of the rotor 112 can be suppressed.

  In addition, by using the split stator core provided with both the fragile portion 15 according to the first embodiment and the fragile portion 25 according to the second embodiment, it is rotated or radially protruded from a predetermined position in the manufacturing process. Even if the split stator core is generated, the magnetic resistance in the circumferential direction can be evenly distributed, and the end faces of the stator teeth can be arranged on the same circumference.

  Although the embodiment of the present invention has been described above, it should be considered that the embodiment disclosed this time is illustrative and not restrictive in all respects. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention is suitable for a stator core of a rotating electrical machine, and particularly suitable for a rotating electrical machine mounted on a hybrid vehicle or an electric vehicle.

It is sectional drawing of the rotary electric machine which concerns on this Embodiment 1. FIG. It is an enlarged plan view of a divided stator core. It is sectional drawing which shows the 1st manufacturing process of a stator core. It is sectional drawing which shows the 2nd manufacturing process of a stator core. It is sectional drawing which shows the 3rd manufacturing process of a stator core. FIG. 6 is an enlarged cross-sectional view of a part of the divided stator core in FIG. 5. It is sectional drawing which shows the 2nd state after the 1st state of the division | segmentation stator core shown in FIG. It is sectional drawing which shows the rotary electric machine which concerns on the 1st modification of this Embodiment 1. FIG. FIG. 9 is a cross-sectional view when the fixing member is shrink-fitted in the stator core manufacturing process shown in FIG. 8. It is sectional drawing which shows the state which the weak part of the fixing member in which the division | segmentation stator core shown in FIG. 9 is located deform | transformed. It is sectional drawing which shows the 2nd modification of this Embodiment 1. FIG. It is sectional drawing which shows the 2nd state after the 1st state of the division | segmentation stator core and fixing member shown in FIG. It is sectional drawing which shows the 3rd modification of this Embodiment 1. It is sectional drawing which shows the 2nd state after the 1st state of the division | segmentation stator core and fixing member shown in FIG. It is sectional drawing of the rotary electric machine which concerns on this Embodiment 2. FIG. It is sectional drawing of a division | segmentation stator core. It is sectional drawing which shows the 1st manufacturing process of the stator core which concerns on this Embodiment 2. FIG. It is sectional drawing which shows the 2nd manufacturing process of the stator core which concerns on this Embodiment 2. FIG. It is sectional drawing to which a part of FIG. 18 was expanded. It is sectional drawing which shows the 2nd state after the 1st state of the split stator core 23 shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Stator core, 11 Fixing member, 12 Assembly stator core, 13 Divided stator core, 14 Stator teeth, 14a End surface, 15b Frame, 15a Space | gap part, 15 Fragile part, 20 Inner metal mold | die.

Claims (12)

An assembly stator core formed by annularly arranging a plurality of divided stator cores;
A fixing member that is disposed on an outer peripheral surface of the assembled stator core, and that can be fixed in a state where the divided stator cores are annularly arranged by pressing the divided stator cores inward in the radial direction of the assembled stator core;
A fragile portion formed between the split stator core and the fixing member, and deformable by a pressing force from the fixing member;
Stator core with   The stator core according to claim 1, wherein the weakened portion is deformable in a radial direction of the assembled stator core.   The stator core according to claim 1, wherein the fragile portion is integrally formed on at least one of an outer peripheral surface of the divided stator core and an inner peripheral surface of the fixing member.   The stator core according to claim 1, wherein the fragile portion includes a gap formed in the fragile portion. An assembly stator core formed by annularly arranging a plurality of divided stator cores;
A fixing member that is disposed on an outer peripheral surface of the assembled stator core, and that can be fixed in a state where the divided stator cores are annularly arranged by pressing the divided stator cores inward in the radial direction of the assembled stator core;
A deformable fragile portion formed between the split stator cores;
Stator core with   The stator core according to claim 5, wherein the fragile portion is formed at a circumferential end of the divided stator core.   The stator core according to claim 5 or 6, wherein the weakened portion is deformable in a circumferential direction of the assembled stator core.   The stator core according to claim 5, wherein the fragile portion includes a gap formed in the fragile portion. An assembly stator core formed by annularly arranging a plurality of divided stator cores;
A fixing member that is disposed on an outer peripheral surface of the assembled stator core, and that can be fixed in a state where the divided stator cores are annularly arranged by pressing the divided stator cores inward in the radial direction of the assembled stator core;
With
A stator core in which one of the fixed member and the divided stator core is made lower in hardness than the other, and one of the divided stator core and the fixed member can be deformed by a pressing force from the fixed member. An assembly stator core formed by annularly arranging a plurality of divided stator cores;
A fixing member that is disposed on an outer peripheral surface of the assembled stator core, and that can be fixed in a state where the divided stator cores are annularly arranged by pressing the divided stator cores inward in the radial direction of the assembled stator core;
A fragile portion formed between the split stator core and the fixing member, and deformable by a pressing force from the fixing member;
A rotatable rotating shaft provided on the inner peripheral side of the assembled stator core;
A rotor fixed to the rotating shaft;
Rotating electric machine with An assembly stator core formed by annularly arranging a plurality of divided stator cores;
A fixing member that is disposed on an outer peripheral surface of the assembled stator core, and that can be fixed in a state in which the divided stator cores are annularly arranged by pressing the divided stator cores inward in the radial direction of the assembled stator cores;
A deformable fragile portion formed between the split stator cores;
A rotatable rotating shaft provided on the inner peripheral side of the assembled stator core;
A rotor fixed to the rotating shaft;
Rotating electric machine with A rotatable rotating shaft;
A rotor fixed to the rotating shaft;
An assembly stator core formed by annularly arranging a plurality of divided stator cores;
A fixing member that is disposed on an outer peripheral surface of the assembled stator core, and that can be fixed in a state where the divided stator cores are annularly arranged by pressing the divided stator cores inward in the radial direction of the assembled stator core;
With
A rotating electrical machine in which one of the fixed member and the divided stator core has a lower hardness than the other, and one of the divided stator core and the fixed member can be deformed by a pressing force from the fixed member.

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